To check if twitter acct hacked you can look at the recent pastebin posts ( page 1 | page 2 | page 3 | page 4 | page 5 ) and do a find for your username.
Additionally a number of websites will search all known publicly posted “hacked” to see if your email or account was ever listed.
The sites that offer these services free of charge are:
https://shouldichangemypassword.com/
https://pwnedlist.com/